发表机构
Seoul National University; Institute for Basic Science; Grand Accélérateur National d’Ions Lourds; CEA/DRF-CNRS/IN2P3; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University（首尔大学; 基础科学研究所; 大离子重离子加速器; 法国原子能委员会/法国国家科学研究中心/法国国家核子和粒子物理研究所; 中山大学中法核工程与技术学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过多核子转移反应产生中子丰裕Au同位素，利用VAMOS++、AGATA和CATLIFE装置进行γ谱学测量，探究接近N=126壳层闭合的高自旋态演化及πh11/2和νi13/2轨道的作用。
AI 中文摘要
背景：双幻核$^{208}$Pb西南区域的核结构对于验证与中子丰裕重元素形成以及质量丰度分布中$A\approx195$峰起源相关的理论模型至关重要。尽管中子丰裕的Pb、Tl和Hg（$Z=80-82$）同位素已被相对充分地研究，但由于实验挑战，中子丰裕Au同位素（$Z=79$）的实验数据仍然非常有限。目的：本研究旨在探究$N=126$壳层闭合附近中子丰裕Au同位素中高自旋结构的演化，并表征其底层壳模型组态，特别关注高$j$唯一宇称$\pi h_{11/2}$和$\nu i_{13/2}$轨道的作用。方法：利用$^{198}$Pt($^{136}$Xe, $^{x}$I)$^{y}$Au多核子转移反应，在7 MeV/u束流能量下产生了中子丰裕$^{195-202}$Au同位素。通过结合VAMOS++大接受度磁谱仪、AGATA HPGe $\gamma$射线追踪阵列和CATLIFE探测系统的独特实验装置，对同位素鉴别的反应产物进行了瞬发和延迟$\gamma$射线谱学测量。
英文摘要
\textbf{Background: } The nuclear structure in the region southwest of the doubly magic $^{208}$Pb is important to benchmark theoretical models relevant for neutron-rich heavy element formation and for the origin of the $A\approx195$ peak in the mass abundance distribution. Although neutron-rich Pb, Tl, and Hg ($Z=80-82$) isotopes are relatively well studied, experimental data for neutron-rich Au isotopes ($Z=79$) remain largely limited due to experimental challenges. \textbf{Purpose: } The purpose of this work is to investigate the evolution of the high-spin structure in neutron-rich Au isotopes near the $N=126$ shell closure and to characterize the underlying shell-model configurations, with a particular focus on the roles of the high-$j$ unique-parity $πh_{11/2}$ and $νi_{13/2}$ orbitals. \textbf{Methods: } Neutron-rich $^{195-202}$Au isotopes were produced using multi-nucleon transfer reactions of $^{198}$Pt($^{136}$Xe, $^{x}$I)$^{y}$Au at a beam energy of 7 MeV/u. %between a 7 MeV/u $^{136}$Xe beam and a $^{198}$Pt target at GANIL. Prompt and delayed $γ$-ray spectroscopy of isotopically identified reaction products was performed with a unique experimental setup combining the VAMOS++ large acceptance magnetic spectrometer, the AGATA HPGe $γ$-ray tracking array, and the CATLIFE detection system.
Commentsdue to limit in abstract length, result and conclusion part in abstract is removed
Journal refPhys. Rev. C 114, 034313 (2026)
